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    H2O (web server)

    From Wikipedia - Reading time: 6 min
    H2O
    Original author(s)‹The template Cslist is being considered for merging.› 
    • Kazuho Oku [ja]
    • DeNA
    Initial releaseFebruary 18, 2015; 10 years ago (2015-02-18)[1]
    Stable release
    2.2.6 / August 13, 2019; 5 years ago (2019-08-13)[2]
    Repository
    Written inC
    Operating systemUnix-like
    TypeWeb server
    LicenseMIT License
    Websiteh2o.examp1e.net Edit this at Wikidata

    H2O is a free and open-source web server. It is written in C, and is distributed under the terms of the MIT License.

    It was designed with a focus on supporting HTTP/2 and TLS, maximizing the use of new web technologies such as prioritization and server push. As a result it achieves significantly better performance than conventional web servers such as nginx.[3]

    Features

    [edit]

    H2O has the following key features:[4]

    • HTTP/1.0 and HTTP/1.1 support
    • HTTP/2 support
      • Full support for dependency and weight-based prioritization with server-side tweaks
      • Cache-aware server push
    • HTTP/3 support (experimental)
    • TCP Fast Open
    • TLS support
      • Session resumption (standalone and memcached)
      • Session tickets with automatic key rollover
      • Automatic OCSP stapling
      • Forward secrecy and fast AEAD cipher suite
      • Private key protection using privilege separation
      • Encrypted Client Hello (experimental)[5]
    • Static file serving
    • FastCGI support
    • Reverse proxy
    • Scripting using mruby (Rack-based)
    • Graceful restart and self-upgrade

    History

    [edit]

    In July 2014, Kazuho Oku [ja] started development of H2O for usage as a server for mobile games while working at DeNA.[6] The initial version was released in December 2014, and the first stable version was released in February 2015 when the HTTP/2 specification was finalized.[7]

    See also

    [edit]
    • Fastly - The largest user of H2O in the world. Oku joined Fastly in January 2017.[citation needed]

    References

    [edit]
    1. ^ Kazuho Oku (2015-02-19). "H2O, the new HTTP server goes version 1.0.0 as HTTP/2 gets finalized". Kazuho's Weblog. Retrieved 2020-08-01.
    2. ^ "Releases". GitHub. Retrieved 2020-08-01.
    3. ^ 原田美穂 (2015-12-08). "Nginxより高速、HTTP/2サーバー「H2O」" (in Japanese). ＠IT. Retrieved 2020-08-01.
    4. ^ "H2O - the optimized HTTP/2 server". DeNA. Retrieved 2020-08-01.
    5. ^ "Base Directives - Configure". H2O - the optimized HTTP/2 server. Archived from the original on 2023-05-29. Retrieved 2023-07-18.
    6. ^ Kazuho Oku (2015-01-27). "H2O - making HTTP better" (in Japanese). SlideShare. Retrieved 2020-08-01.
    7. ^ Kazuho Oku (2016-02-05). "ウェブを速くするためにDeNAがやっていること - HTTP/2と、さらにその先" (in Japanese). SlideShare. Retrieved 2020-08-01.
    [edit]
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